Comparison

Radonsystem vs Speedometer

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Radonsystem

Features
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Mit der Radonsystem-App kΓΆnnen die Messwerte des Radonsystems verwaltet werden. Das Radonsystem ist ein Radonsensor, der das radioaktive Edelgas Radon in der Wohnung misst. Mit dieser App kΓΆnnen die Radonwerte ΓΌber Bluetooth oder das Internet ausgelesen werden.

About

Speedometer

Features
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See your speed clearly without jumpy readings or clutter. Get a smooth live speedometer, switch between mph and km/h in a press, and keep your screen awake while a trip is running. Speedometer: GPS, mph & km/h helps drivers and riders check current speed, track trips, and save useful speed records. GREAT FOR Use it in the car when you want a large GPS speedometer that is easy to glance at. Use it on a bike or scooter when a clean speed gauge is easier to read than a crowded map. It is also handy when you want to share your current speed as a square card, copy the speed as text, or look back at your personal best with the date you reached it. KEY TOOLS Watch your speed on a bold arc dial with a live readout that stays steadier when signal quality changes. Choose smoothing presets like Off, Light, or Strong to reduce flicker, and swap mph or km/h by long-pressing the unit label. A threshold flash gives extra visual notice when your speed climbs, and the app respects reduced motion settings for a calmer display. Keep the screen on during an active trip so the speedometer stays visible. Copy your current speed as text with a tap, or share it as a clean square image. Your personal-best banner saves your peak speed across sessions and lets you reset it when you want a fresh start. If you ever want a refresher, you can replay the welcome screens from About. WHY PEOPLE CHOOSE IT This speedometer is built for quick checks on the go: open it, allow location while using the app, and start reading speed right away. The smoothing options and brief hold on valid readings help avoid the annoying drop-to-zero look that can happen with weak signal moments. Small controls like quick unit swap, the safety chip, and the clear status card make it simple to use whether you are commuting, testing a new route, or checking pace on an open road. PAID FEATURES Pro adds more ways to track and review every trip. Turn on HUD mirror for a reflected view, set a speed alert with vibration and an optional sound, and save trip history to revisit past drives and rides. Open a trip detail page to see the route, a marker for top speed, and a street-level preview. You can also export one trip or all trips, keep an active trip on the Lock Screen, add a Last Trip Home Screen widget, ask Siri to start or end a trip or tell you your current speed, and choose from four extra themes. Location access is used to estimate speed while you use the app, and location is not stored on our servers. Try Speedometer: GPS, mph & km/h and get a clearer, calmer way to track speed and trips. Terms of Use (EULA) - http://www.apple.com/legal/itunes/appstore/dev/stdeula

Screenshots

Radonsystem1 screens
Speedometer4 screens

Verdict

The call

The clearest difference is in-app purchases: Radonsystem at none against Speedometer's 10. Radonsystem also leads on ads (none vs shown) and iOS requirement (13.0 vs 26.0). Speedometer's advantage is update cadence (every 2 months vs every 23 months). On price and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Speedometer sells 10 in-app purchases, starting at $1.99 per 7 days. Radonsystem asks for nothing beyond the download.

UpkeepUpdate frequency

Radonsystem ships an update every 23 months, Speedometer every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard4 real differences Β· 2 level
Radonsystem versus Speedometer: the parameters behind the verdict, then further details
ParameterRadonsystemSpeedometer
PriceFreeFree
Update frequencyEvery 23 monthsEvery 2 months β€” better
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS13.0 β€” better26.0
Further details β€” not scored
Size4 MB10 MB
Age rating4+4+
DeveloperAlexander BernittSandeep Bhandari

In-app purchases

None

Radonsystem

No in-app purchases

10 purchases

Speedometer

Subscriptions8
  • Weekly Subscription$1.997 Days
  • Speedometer Pro β€” Weekly$4.997 Days
  • Monthly Subscription7 Days trial$4.991 Month
Show 5 more
  • Yearly Subscription Discount7 Days trial$14.991 Year
  • Yearly Subscription Sale$14.991 Year
  • Yearly Subscription Special$19.991 Year
  • Speedometer Pro β€” Annual7 Days trial$29.991 Year
  • Yearly Subscription1 Year trial$29.991 Year
One-time2
  • Forever Pro Discount$79.99
  • Pro Unlock: Lifetime$99.99

Questions

Is Radonsystem free?
Radonsystem is free to download, with no in-app purchases.
Is Speedometer free?
Speedometer is free to download, with in-app purchases available.
Do Radonsystem or Speedometer have ads?
Speedometer shows ads; Radonsystem does not.
Which is updated more often, Radonsystem or Speedometer?
Radonsystem ships an update every 23 months, and Speedometer every 2 months. Most recently, Radonsystem was updated on October 27, 2026 and Speedometer on October 25, 2026.

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